could trace
Verbo regolare: trace - traced- traced

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could trace
you could trace
he could trace
we could trace
you could trace
they could trace 	I could be tracing
you could be tracing
he could be tracing
we could be tracing
you could be tracing
they could be tracing	I could have traced
you could have traced
he could have traced
we could have traced
you could have traced
they could have traced	I could have been tracing
you could have been tracing
he could have been tracing
we could have been tracing
you could have been tracing
they could have been tracing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't trace
you couldn't trace
he couldn't trace
we couldn't trace
you couldn't trace
they couldn't trace 	I couldn't be tracing
you couldn't be tracing
he couldn't be tracing
we couldn't be tracing
you couldn't be tracing
they couldn't be tracing	I couldn't have traced
you couldn't have traced
he couldn't have traced
we couldn't have traced
you couldn't have traced
they couldn't have traced	I couldn't have been tracing
you couldn't have been tracing
he couldn't have been tracing
we couldn't have been tracing
you couldn't have been tracing
they couldn't have been tracing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I trace?
could you trace?
could he trace?
could we trace?
could you trace?
could they trace? 	could I be tracing?
could you be tracing?
could he be tracing?
could we be tracing?
could you be tracing?
could they be tracing? 	could I have traced?
could you have traced?
could he have traced?
could we have traced?
could you have traced?
could they have traced? 	could I have been tracing?
could you have been tracing?
could he have been tracing?
could we have been tracing?
could you have been tracing?
could they have been tracing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I trace?
couldn't you trace?
couldn't he trace?
couldn't we trace?
couldn't you trace?
couldn't they trace? 	couldn't I be tracing?
couldn't you be tracing?
couldn't he be tracing?
couldn't we be tracing?
couldn't you be tracing?
couldn't they be tracing? 	couldn't I have traced?
couldn't you have traced?
couldn't he have traced?
couldn't we have traced?
couldn't you have traced?
couldn't they have traced? 	couldn't I have been tracing?
couldn't you have been tracing?
couldn't he have been tracing?
couldn't we have been tracing?
couldn't you have been tracing?
couldn't they have been tracing?